From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751072AbbD3Lgi (ORCPT ); Thu, 30 Apr 2015 07:36:38 -0400 Received: from mail-wg0-f42.google.com ([74.125.82.42]:34622 "EHLO mail-wg0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750802AbbD3Lgd (ORCPT ); Thu, 30 Apr 2015 07:36:33 -0400 From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: rkrcmar@redhat.com, bsd@redhat.com, guangrong.xiao@linux.intel.com, Yang Zhang , wanpeng.li@linux.intel.com Subject: [PATCH 01/13] KVM: MMU: fix for CR4.SMEP=1, CR0.WP=0? Date: Thu, 30 Apr 2015 13:36:00 +0200 Message-Id: <1430393772-27208-2-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1430393772-27208-1-git-send-email-pbonzini@redhat.com> References: <1430393772-27208-1-git-send-email-pbonzini@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org smep_andnot_wp is initialized in kvm_init_shadow_mmu and shadow pages should not be reused for different values of it. Thus, it has to be added to the mask in kvm_mmu_pte_write. Signed-off-by: Paolo Bonzini --- arch/x86/kvm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index d43867c33bc4..209fe1477465 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -4238,7 +4238,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, ++vcpu->kvm->stat.mmu_pte_write; kvm_mmu_audit(vcpu, AUDIT_PRE_PTE_WRITE); - mask.cr0_wp = mask.cr4_pae = mask.nxe = 1; + mask.cr0_wp = mask.cr4_pae = mask.nxe = mask.smep_andnot_wp = 1; for_each_gfn_indirect_valid_sp(vcpu->kvm, sp, gfn) { if (detect_write_misaligned(sp, gpa, bytes) || detect_write_flooding(sp)) { -- 1.8.3.1